drivers/clk/mmp/clk-of-mmp2.c

   1 /*
   2  * mmp2 clock framework source file
   3  *
   4  * Copyright (C) 2012 Marvell
   5  * Chao Xie <xiechao.mail@gmail.com>
   6  *
   7  * This file is licensed under the terms of the GNU General Public
   8  * License version 2. This program is licensed "as is" without any
   9  * warranty of any kind, whether express or implied.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/spinlock.h>
  15 #include <linux/io.h>
  16 #include <linux/delay.h>
  17 #include <linux/err.h>
  18 #include <linux/of_address.h>
  19
  20 #include <dt-bindings/clock/marvell,mmp2.h>
  21
  22 #include "clk.h"
  23 #include "reset.h"
  24
  25 #define APBC_RTC        0x0
  26 #define APBC_TWSI0      0x4
  27 #define APBC_TWSI1      0x8
  28 #define APBC_TWSI2      0xc
  29 #define APBC_TWSI3      0x10
  30 #define APBC_TWSI4      0x7c
  31 #define APBC_TWSI5      0x80
  32 #define APBC_KPC        0x18
  33 #define APBC_TIMER      0x24
  34 #define APBC_UART0      0x2c
  35 #define APBC_UART1      0x30
  36 #define APBC_UART2      0x34
  37 #define APBC_UART3      0x88
  38 #define APBC_GPIO       0x38
  39 #define APBC_PWM0       0x3c
  40 #define APBC_PWM1       0x40
  41 #define APBC_PWM2       0x44
  42 #define APBC_PWM3       0x48
  43 #define APBC_SSP0       0x50
  44 #define APBC_SSP1       0x54
  45 #define APBC_SSP2       0x58
  46 #define APBC_SSP3       0x5c
  47 #define APMU_SDH0       0x54
  48 #define APMU_SDH1       0x58
  49 #define APMU_SDH2       0xe8
  50 #define APMU_SDH3       0xec
  51 #define APMU_USB        0x5c
  52 #define APMU_DISP0      0x4c
  53 #define APMU_DISP1      0x110
  54 #define APMU_CCIC0      0x50
  55 #define APMU_CCIC1      0xf4
  56 #define APMU_SP         0x68
  57 #define MPMU_UART_PLL   0x14
  58
  59 struct mmp2_clk_unit {
  60         struct mmp_clk_unit unit;
  61         void __iomem *mpmu_base;
  62         void __iomem *apmu_base;
  63         void __iomem *apbc_base;
  64 };
  65
  66 static struct mmp_param_fixed_rate_clk fixed_rate_clks[] = {
  67         {MMP2_CLK_CLK32, "clk32", NULL, 0, 32768},
  68         {MMP2_CLK_VCTCXO, "vctcxo", NULL, 0, 26000000},
  69         {MMP2_CLK_PLL1, "pll1", NULL, 0, 800000000},
  70         {MMP2_CLK_PLL2, "pll2", NULL, 0, 960000000},
  71         {MMP2_CLK_USB_PLL, "usb_pll", NULL, 0, 480000000},
  72 };
  73
  74 static struct mmp_param_fixed_factor_clk fixed_factor_clks[] = {
  75         {MMP2_CLK_PLL1_2, "pll1_2", "pll1", 1, 2, 0},
  76         {MMP2_CLK_PLL1_4, "pll1_4", "pll1_2", 1, 2, 0},
  77         {MMP2_CLK_PLL1_8, "pll1_8", "pll1_4", 1, 2, 0},
  78         {MMP2_CLK_PLL1_16, "pll1_16", "pll1_8", 1, 2, 0},
  79         {MMP2_CLK_PLL1_20, "pll1_20", "pll1_4", 1, 5, 0},
  80         {MMP2_CLK_PLL1_3, "pll1_3", "pll1", 1, 3, 0},
  81         {MMP2_CLK_PLL1_6, "pll1_6", "pll1_3", 1, 2, 0},
  82         {MMP2_CLK_PLL1_12, "pll1_12", "pll1_6", 1, 2, 0},
  83         {MMP2_CLK_PLL2_2, "pll2_2", "pll2", 1, 2, 0},
  84         {MMP2_CLK_PLL2_4, "pll2_4", "pll2_2", 1, 2, 0},
  85         {MMP2_CLK_PLL2_8, "pll2_8", "pll2_4", 1, 2, 0},
  86         {MMP2_CLK_PLL2_16, "pll2_16", "pll2_8", 1, 2, 0},
  87         {MMP2_CLK_PLL2_3, "pll2_3", "pll2", 1, 3, 0},
  88         {MMP2_CLK_PLL2_6, "pll2_6", "pll2_3", 1, 2, 0},
  89         {MMP2_CLK_PLL2_12, "pll2_12", "pll2_6", 1, 2, 0},
  90         {MMP2_CLK_VCTCXO_2, "vctcxo_2", "vctcxo", 1, 2, 0},
  91         {MMP2_CLK_VCTCXO_4, "vctcxo_4", "vctcxo_2", 1, 2, 0},
  92 };
  93
  94 static struct mmp_clk_factor_masks uart_factor_masks = {
  95         .factor = 2,
  96         .num_mask = 0x1fff,
  97         .den_mask = 0x1fff,
  98         .num_shift = 16,
  99         .den_shift = 0,
 100 };
 101
 102 static struct mmp_clk_factor_tbl uart_factor_tbl[] = {
 103         {.num = 8125, .den = 1536},     /*14.745MHZ */
 104         {.num = 3521, .den = 689},      /*19.23MHZ */
 105 };
 106
 107 static void mmp2_pll_init(struct mmp2_clk_unit *pxa_unit)
 108 {
 109         struct clk *clk;
 110         struct mmp_clk_unit *unit = &pxa_unit->unit;
 111
 112         mmp_register_fixed_rate_clks(unit, fixed_rate_clks,
 113                                         ARRAY_SIZE(fixed_rate_clks));
 114
 115         mmp_register_fixed_factor_clks(unit, fixed_factor_clks,
 116                                         ARRAY_SIZE(fixed_factor_clks));
 117
 118         clk = mmp_clk_register_factor("uart_pll", "pll1_4",
 119                                 CLK_SET_RATE_PARENT,
 120                                 pxa_unit->mpmu_base + MPMU_UART_PLL,
 121                                 &uart_factor_masks, uart_factor_tbl,
 122                                 ARRAY_SIZE(uart_factor_tbl), NULL);
 123         mmp_clk_add(unit, MMP2_CLK_UART_PLL, clk);
 124 }
 125
 126 static DEFINE_SPINLOCK(uart0_lock);
 127 static DEFINE_SPINLOCK(uart1_lock);
 128 static DEFINE_SPINLOCK(uart2_lock);
 129 static const char *uart_parent_names[] = {"uart_pll", "vctcxo"};
 130
 131 static DEFINE_SPINLOCK(ssp0_lock);
 132 static DEFINE_SPINLOCK(ssp1_lock);
 133 static DEFINE_SPINLOCK(ssp2_lock);
 134 static DEFINE_SPINLOCK(ssp3_lock);
 135 static const char *ssp_parent_names[] = {"vctcxo_4", "vctcxo_2", "vctcxo", "pll1_16"};
 136
 137 static DEFINE_SPINLOCK(timer_lock);
 138 static const char *timer_parent_names[] = {"clk32", "vctcxo_2", "vctcxo_4", "vctcxo"};
 139
 140 static DEFINE_SPINLOCK(reset_lock);
 141
 142 static struct mmp_param_mux_clk apbc_mux_clks[] = {
 143         {0, "uart0_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART0, 4, 3, 0, &uart0_lock},
 144         {0, "uart1_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART1, 4, 3, 0, &uart1_lock},
 145         {0, "uart2_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART2, 4, 3, 0, &uart2_lock},
 146         {0, "uart3_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART3, 4, 3, 0, &uart2_lock},
 147         {0, "ssp0_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP0, 4, 3, 0, &ssp0_lock},
 148         {0, "ssp1_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP1, 4, 3, 0, &ssp1_lock},
 149         {0, "ssp2_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP2, 4, 3, 0, &ssp2_lock},
 150         {0, "ssp3_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP3, 4, 3, 0, &ssp3_lock},
 151         {0, "timer_mux", timer_parent_names, ARRAY_SIZE(timer_parent_names), CLK_SET_RATE_PARENT, APBC_TIMER, 4, 3, 0, &timer_lock},
 152 };
 153
 154 static struct mmp_param_gate_clk apbc_gate_clks[] = {
 155         {MMP2_CLK_TWSI0, "twsi0_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_TWSI0, 0x7, 0x3, 0x0, 0, &reset_lock},
 156         {MMP2_CLK_TWSI1, "twsi1_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_TWSI1, 0x7, 0x3, 0x0, 0, &reset_lock},
 157         {MMP2_CLK_TWSI2, "twsi2_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_TWSI2, 0x7, 0x3, 0x0, 0, &reset_lock},
 158         {MMP2_CLK_TWSI3, "twsi3_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_TWSI3, 0x7, 0x3, 0x0, 0, &reset_lock},
 159         {MMP2_CLK_TWSI4, "twsi4_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_TWSI4, 0x7, 0x3, 0x0, 0, &reset_lock},
 160         {MMP2_CLK_TWSI5, "twsi5_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_TWSI5, 0x7, 0x3, 0x0, 0, &reset_lock},
 161         {MMP2_CLK_GPIO, "gpio_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_GPIO, 0x7, 0x3, 0x0, 0, &reset_lock},
 162         {MMP2_CLK_KPC, "kpc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_KPC, 0x7, 0x3, 0x0, MMP_CLK_GATE_NEED_DELAY, &reset_lock},
 163         {MMP2_CLK_RTC, "rtc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_RTC, 0x87, 0x83, 0x0, MMP_CLK_GATE_NEED_DELAY, &reset_lock},
 164         {MMP2_CLK_PWM0, "pwm0_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM0, 0x7, 0x3, 0x0, 0, &reset_lock},
 165         {MMP2_CLK_PWM1, "pwm1_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM1, 0x7, 0x3, 0x0, 0, &reset_lock},
 166         {MMP2_CLK_PWM2, "pwm2_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM2, 0x7, 0x3, 0x0, 0, &reset_lock},
 167         {MMP2_CLK_PWM3, "pwm3_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM3, 0x7, 0x3, 0x0, 0, &reset_lock},
 168         /* The gate clocks has mux parent. */
 169         {MMP2_CLK_UART0, "uart0_clk", "uart0_mux", CLK_SET_RATE_PARENT, APBC_UART0, 0x7, 0x3, 0x0, 0, &uart0_lock},
 170         {MMP2_CLK_UART1, "uart1_clk", "uart1_mux", CLK_SET_RATE_PARENT, APBC_UART1, 0x7, 0x3, 0x0, 0, &uart1_lock},
 171         {MMP2_CLK_UART2, "uart2_clk", "uart2_mux", CLK_SET_RATE_PARENT, APBC_UART2, 0x7, 0x3, 0x0, 0, &uart2_lock},
 172         {MMP2_CLK_UART3, "uart3_clk", "uart3_mux", CLK_SET_RATE_PARENT, APBC_UART3, 0x7, 0x3, 0x0, 0, &uart2_lock},
 173         {MMP2_CLK_SSP0, "ssp0_clk", "ssp0_mux", CLK_SET_RATE_PARENT, APBC_SSP0, 0x7, 0x3, 0x0, 0, &ssp0_lock},
 174         {MMP2_CLK_SSP1, "ssp1_clk", "ssp1_mux", CLK_SET_RATE_PARENT, APBC_SSP1, 0x7, 0x3, 0x0, 0, &ssp1_lock},
 175         {MMP2_CLK_SSP2, "ssp2_clk", "ssp2_mux", CLK_SET_RATE_PARENT, APBC_SSP2, 0x7, 0x3, 0x0, 0, &ssp2_lock},
 176         {MMP2_CLK_SSP3, "ssp3_clk", "ssp3_mux", CLK_SET_RATE_PARENT, APBC_SSP3, 0x7, 0x3, 0x0, 0, &ssp3_lock},
 177         {MMP2_CLK_TIMER, "timer_clk", "timer_mux", CLK_SET_RATE_PARENT, APBC_TIMER, 0x7, 0x3, 0x0, 0, &timer_lock},
 178 };
 179
 180 static void mmp2_apb_periph_clk_init(struct mmp2_clk_unit *pxa_unit)
 181 {
 182         struct mmp_clk_unit *unit = &pxa_unit->unit;
 183
 184         mmp_register_mux_clks(unit, apbc_mux_clks, pxa_unit->apbc_base,
 185                                 ARRAY_SIZE(apbc_mux_clks));
 186
 187         mmp_register_gate_clks(unit, apbc_gate_clks, pxa_unit->apbc_base,
 188                                 ARRAY_SIZE(apbc_gate_clks));
 189 }
 190
 191 static DEFINE_SPINLOCK(sdh_lock);
 192 static const char *sdh_parent_names[] = {"pll1_4", "pll2", "usb_pll", "pll1"};
 193 static struct mmp_clk_mix_config sdh_mix_config = {
 194         .reg_info = DEFINE_MIX_REG_INFO(4, 10, 2, 8, 32),
 195 };
 196
 197 static DEFINE_SPINLOCK(usb_lock);
 198
 199 static DEFINE_SPINLOCK(disp0_lock);
 200 static DEFINE_SPINLOCK(disp1_lock);
 201 static const char *disp_parent_names[] = {"pll1", "pll1_16", "pll2", "vctcxo"};
 202
 203 static DEFINE_SPINLOCK(ccic0_lock);
 204 static DEFINE_SPINLOCK(ccic1_lock);
 205 static const char *ccic_parent_names[] = {"pll1_2", "pll1_16", "vctcxo"};
 206 static struct mmp_clk_mix_config ccic0_mix_config = {
 207         .reg_info = DEFINE_MIX_REG_INFO(4, 17, 2, 6, 32),
 208 };
 209 static struct mmp_clk_mix_config ccic1_mix_config = {
 210         .reg_info = DEFINE_MIX_REG_INFO(4, 16, 2, 6, 32),
 211 };
 212
 213 static DEFINE_SPINLOCK(sp_lock);
 214
 215 static struct mmp_param_mux_clk apmu_mux_clks[] = {
 216         {MMP2_CLK_DISP0_MUX, "disp0_mux", disp_parent_names, ARRAY_SIZE(disp_parent_names), CLK_SET_RATE_PARENT, APMU_DISP0, 6, 2, 0, &disp0_lock},
 217         {MMP2_CLK_DISP1_MUX, "disp1_mux", disp_parent_names, ARRAY_SIZE(disp_parent_names), CLK_SET_RATE_PARENT, APMU_DISP1, 6, 2, 0, &disp1_lock},
 218 };
 219
 220 static struct mmp_param_div_clk apmu_div_clks[] = {
 221         {0, "disp0_div", "disp0_mux", CLK_SET_RATE_PARENT, APMU_DISP0, 8, 4, 0, &disp0_lock},
 222         {0, "disp0_sphy_div", "disp0_mux", CLK_SET_RATE_PARENT, APMU_DISP0, 15, 5, 0, &disp0_lock},
 223         {0, "disp1_div", "disp1_mux", CLK_SET_RATE_PARENT, APMU_DISP1, 8, 4, 0, &disp1_lock},
 224         {0, "ccic0_sphy_div", "ccic0_mix_clk", CLK_SET_RATE_PARENT, APMU_CCIC0, 10, 5, 0, &ccic0_lock},
 225         {0, "ccic1_sphy_div", "ccic1_mix_clk", CLK_SET_RATE_PARENT, APMU_CCIC1, 10, 5, 0, &ccic1_lock},
 226 };
 227
 228 static struct mmp_param_gate_clk apmu_gate_clks[] = {
 229         {MMP2_CLK_USB, "usb_clk", "usb_pll", 0, APMU_USB, 0x9, 0x9, 0x0, 0, &usb_lock},
 230         /* The gate clocks has mux parent. */
 231         {MMP2_CLK_SDH0, "sdh0_clk", "sdh_mix_clk", CLK_SET_RATE_PARENT, APMU_SDH0, 0x1b, 0x1b, 0x0, 0, &sdh_lock},
 232         {MMP2_CLK_SDH1, "sdh1_clk", "sdh_mix_clk", CLK_SET_RATE_PARENT, APMU_SDH1, 0x1b, 0x1b, 0x0, 0, &sdh_lock},
 233         {MMP2_CLK_SDH2, "sdh2_clk", "sdh_mix_clk", CLK_SET_RATE_PARENT, APMU_SDH2, 0x1b, 0x1b, 0x0, 0, &sdh_lock},
 234         {MMP2_CLK_SDH3, "sdh3_clk", "sdh_mix_clk", CLK_SET_RATE_PARENT, APMU_SDH3, 0x1b, 0x1b, 0x0, 0, &sdh_lock},
 235         {MMP2_CLK_DISP0, "disp0_clk", "disp0_div", CLK_SET_RATE_PARENT, APMU_DISP0, 0x1b, 0x1b, 0x0, 0, &disp0_lock},
 236         {MMP2_CLK_DISP0_SPHY, "disp0_sphy_clk", "disp0_sphy_div", CLK_SET_RATE_PARENT, APMU_DISP0, 0x1024, 0x1024, 0x0, 0, &disp0_lock},
 237         {MMP2_CLK_DISP1, "disp1_clk", "disp1_div", CLK_SET_RATE_PARENT, APMU_DISP1, 0x1b, 0x1b, 0x0, 0, &disp1_lock},
 238         {MMP2_CLK_CCIC_ARBITER, "ccic_arbiter", "vctcxo", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x1800, 0x1800, 0x0, 0, &ccic0_lock},
 239         {MMP2_CLK_CCIC0, "ccic0_clk", "ccic0_mix_clk", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x1b, 0x1b, 0x0, 0, &ccic0_lock},
 240         {MMP2_CLK_CCIC0_PHY, "ccic0_phy_clk", "ccic0_mix_clk", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x24, 0x24, 0x0, 0, &ccic0_lock},
 241         {MMP2_CLK_CCIC0_SPHY, "ccic0_sphy_clk", "ccic0_sphy_div", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x300, 0x300, 0x0, 0, &ccic0_lock},
 242         {MMP2_CLK_CCIC1, "ccic1_clk", "ccic1_mix_clk", CLK_SET_RATE_PARENT, APMU_CCIC1, 0x1b, 0x1b, 0x0, 0, &ccic1_lock},
 243         {MMP2_CLK_CCIC1_PHY, "ccic1_phy_clk", "ccic1_mix_clk", CLK_SET_RATE_PARENT, APMU_CCIC1, 0x24, 0x24, 0x0, 0, &ccic1_lock},
 244         {MMP2_CLK_CCIC1_SPHY, "ccic1_sphy_clk", "ccic1_sphy_div", CLK_SET_RATE_PARENT, APMU_CCIC1, 0x300, 0x300, 0x0, 0, &ccic1_lock},
 245         {MMP2_CLK_SP, "sp_clk", NULL, CLK_SET_RATE_PARENT, APMU_SP, 0x1b, 0x1b, 0x0, 0, &sp_lock},
 246 };
 247
 248 static void mmp2_axi_periph_clk_init(struct mmp2_clk_unit *pxa_unit)
 249 {
 250         struct clk *clk;
 251         struct mmp_clk_unit *unit = &pxa_unit->unit;
 252
 253         sdh_mix_config.reg_info.reg_clk_ctrl = pxa_unit->apmu_base + APMU_SDH0;
 254         clk = mmp_clk_register_mix(NULL, "sdh_mix_clk", sdh_parent_names,
 255                                         ARRAY_SIZE(sdh_parent_names),
 256                                         CLK_SET_RATE_PARENT,
 257                                         &sdh_mix_config, &sdh_lock);
 258
 259         ccic0_mix_config.reg_info.reg_clk_ctrl = pxa_unit->apmu_base + APMU_CCIC0;
 260         clk = mmp_clk_register_mix(NULL, "ccic0_mix_clk", ccic_parent_names,
 261                                         ARRAY_SIZE(ccic_parent_names),
 262                                         CLK_SET_RATE_PARENT,
 263                                         &ccic0_mix_config, &ccic0_lock);
 264         mmp_clk_add(unit, MMP2_CLK_CCIC0_MIX, clk);
 265
 266         ccic1_mix_config.reg_info.reg_clk_ctrl = pxa_unit->apmu_base + APMU_CCIC1;
 267         clk = mmp_clk_register_mix(NULL, "ccic1_mix_clk", ccic_parent_names,
 268                                         ARRAY_SIZE(ccic_parent_names),
 269                                         CLK_SET_RATE_PARENT,
 270                                         &ccic1_mix_config, &ccic1_lock);
 271         mmp_clk_add(unit, MMP2_CLK_CCIC1_MIX, clk);
 272
 273         mmp_register_mux_clks(unit, apmu_mux_clks, pxa_unit->apmu_base,
 274                                 ARRAY_SIZE(apmu_mux_clks));
 275
 276         mmp_register_div_clks(unit, apmu_div_clks, pxa_unit->apmu_base,
 277                                 ARRAY_SIZE(apmu_div_clks));
 278
 279         mmp_register_gate_clks(unit, apmu_gate_clks, pxa_unit->apmu_base,
 280                                 ARRAY_SIZE(apmu_gate_clks));
 281 }
 282
 283 static void mmp2_clk_reset_init(struct device_node *np,
 284                                 struct mmp2_clk_unit *pxa_unit)
 285 {
 286         struct mmp_clk_reset_cell *cells;
 287         int i, nr_resets;
 288
 289         nr_resets = ARRAY_SIZE(apbc_gate_clks);
 290         cells = kcalloc(nr_resets, sizeof(*cells), GFP_KERNEL);
 291         if (!cells)
 292                 return;
 293
 294         for (i = 0; i < nr_resets; i++) {
 295                 cells[i].clk_id = apbc_gate_clks[i].id;
 296                 cells[i].reg = pxa_unit->apbc_base + apbc_gate_clks[i].offset;
 297                 cells[i].flags = 0;
 298                 cells[i].lock = apbc_gate_clks[i].lock;
 299                 cells[i].bits = 0x4;
 300         }
 301
 302         mmp_clk_reset_register(np, cells, nr_resets);
 303 }
 304
 305 static void __init mmp2_clk_init(struct device_node *np)
 306 {
 307         struct mmp2_clk_unit *pxa_unit;
 308
 309         pxa_unit = kzalloc(sizeof(*pxa_unit), GFP_KERNEL);
 310         if (!pxa_unit)
 311                 return;
 312
 313         pxa_unit->mpmu_base = of_iomap(np, 0);
 314         if (!pxa_unit->mpmu_base) {
 315                 pr_err("failed to map mpmu registers\n");
 316                 goto free_memory;
 317         }
 318
 319         pxa_unit->apmu_base = of_iomap(np, 1);
 320         if (!pxa_unit->apmu_base) {
 321                 pr_err("failed to map apmu registers\n");
 322                 goto unmap_mpmu_region;
 323         }
 324
 325         pxa_unit->apbc_base = of_iomap(np, 2);
 326         if (!pxa_unit->apbc_base) {
 327                 pr_err("failed to map apbc registers\n");
 328                 goto unmap_apmu_region;
 329         }
 330
 331         mmp_clk_init(np, &pxa_unit->unit, MMP2_NR_CLKS);
 332
 333         mmp2_pll_init(pxa_unit);
 334
 335         mmp2_apb_periph_clk_init(pxa_unit);
 336
 337         mmp2_axi_periph_clk_init(pxa_unit);
 338
 339         mmp2_clk_reset_init(np, pxa_unit);
 340
 341         return;
 342
 343 unmap_apmu_region:
 344         iounmap(pxa_unit->apmu_base);
 345 unmap_mpmu_region:
 346         iounmap(pxa_unit->mpmu_base);
 347 free_memory:
 348         kfree(pxa_unit);
 349 }
 350
 351 CLK_OF_DECLARE(mmp2_clk, "marvell,mmp2-clock", mmp2_clk_init);